# GP 6: Upgrade zkBob to support direct deposits Direct deposits are subject to the newly introduced limits at the time of submission * **dailyUserDirectDepositCap** - limit on the amount for daily direct deposits submitted by a single user * **directDepositCap** - limit on the amount of a single direct deposit Each direct deposit is subject to a submission fee at the time of its submission: * **directDepositFee** - direct deposit fee Each direct deposit left unprocessed by the relayer for a certain amount of time can be refunded in full by the user: * **directDepositTimeout** - configured direct deposit refund timeout {% hint style="info" %} Learn more about Direct Deposit functionality and how to use in our [hackathon instructions](broken://pages/6ZgmL7bkT5HT7iKf42PI). {% endhint %} ### Proposal objective Upgrade existing zkBob pool with the support for direct deposits using the following configuration: 1. **dailyUserDirectDepositCap** - 10,000 **BOB** (18 decimals) 2. **directDepositCap** - 1,000 **BOB** (18 decimals) 3. **directDepositFee** - 0.1 **BOB** (18 decimals) 4. **directDepositTimeout** - 24 hours ↔ 86,400 seconds The module for direct deposits is deployed in a separate contract [0x668c5286eAD26fAC5fa944887F9D2F20f7DDF289](https://polygonscan.com/address/0x668c5286eAD26fAC5fa944887F9D2F20f7DDF289). It owner is configured to the governance multisig ([0xd4a3D9Ca00fa1fD8833D560F9217458E61c446d8](https://polygonscan.com/address/0xd4a3D9Ca00fa1fD8833D560F9217458E61c446d8)). See [Additional verification](https://www.notion.so/Additional-verification-70d2b873ad8f4c479cda335044fbcc14) for verification. The direct deposits module address is hardcoded into the new zkBob pool implementation contract proposed for upgrade. The upgrade also adds a new snark verifier for direct deposit batch verification - [0x9a7B4198065efE631a962e737bDfE1f44f2CB3EE](https://polygonscan.com/address/0x9a7B4198065efE631a962e737bDfE1f44f2CB3EE) The snark verifier for transfers is redeployed to reflect changes in the transfer verification snark - [0xA86C511832eAd78d30ad49711874a9F3a1dfb840](https://polygonscan.com/address/0xA86C511832eAd78d30ad49711874a9F3a1dfb840) The snark verifier for tree updates is left unchanged and is reused from the previous deployment - [0x82907eAeB25D248dC82033E45b00A3E012Ba2d0D](https://polygonscan.com/address/0x82907eAeB25D248dC82033E45b00A3E012Ba2d0D) ### Proposal breakdown The corresponding transaction in the governance safe is [transaction #26](https://app.safe.global/matic:0xd4a3D9Ca00fa1fD8833D560F9217458E61c446d8/transactions/tx?id=multisig_0xd4a3D9Ca00fa1fD8833D560F9217458E61c446d8_0x24c9789d8f5718b6e3bb8f6ce9e97493f0685e91f07f5d8b8bd0e583436dfe44). The transaction contains 3 actions: #### Action 1 zkBobPool contract upgrade [`0x72e6B59D4a90ab232e55D4BB7ed2dD17494D62fB`](https://polygonscan.com/address/0x72e6B59D4a90ab232e55D4BB7ed2dD17494D62fB). The new implementation [`0x0eDcE5CAf830c6b845503001D8378b0d4F3b89bB`](https://polygonscan.com/address/0x0eDcE5CAf830c6b845503001D8378b0d4F3b89bB) is applied through the `upgradeTo` call (the selector is `0x3659cfe6`). #### Action 2 `setLimits` call (the selector is `0xe8fd02e4`) from the zkBobPool contract [`0x72e6B59D4a90ab232e55D4BB7ed2dD17494D62fB`](https://polygonscan.com/address/0x72e6B59D4a90ab232e55D4BB7ed2dD17494D62fB). The method is called to update limits related to direct deposits in tier `0`. The current limits for the tier `0` set in the pool contract are: ``` Cap: 1'000'000 BOB dailyDepositCap: 300'000 BOB dailyWithdrawalCap: 100'000 BOB dailyUserDepositCap: 10'000 BOB depositCap: 10'000 BOB dailyUserDirectDepositCap: 10'000 BOB directDepositCap: 1'000 BOB ``` The event is emitted with the same value. #### Action 3 `setLimits` call (the selector is `0xe8fd02e4`) from the zkBobPool contract [`0x72e6B59D4a90ab232e55D4BB7ed2dD17494D62fB`](https://polygonscan.com/address/0x72e6B59D4a90ab232e55D4BB7ed2dD17494D62fB). The method is called to update limits related to direct deposits in tier `1`. The current limits for the tier `1` set in the pool contract are: ``` tvlCap: 1'000'000 BOB dailyDepositCap: 300'000 BOB dailyWithdrawalCap: 100'000 BOB dailyUserDepositCap: 100'000 BOB depositCap: 100'000 BOB dailyUserDirectDepositCap: 10'000 BOB directDepositCap: 1'000 BOB ``` The event is emitted with the same value. ### Additional verification Diff between previous and new implementations of `ZkBobPool` - (auto-generated by ) Configuration of proposed contracts can be checked using the following commands: ```coq $ cast call --rpc-url https://rpc.ankr.com/polygon 0x0eDcE5CAf830c6b845503001D8378b0d4F3b89bB 'pool_id() (uint24)' 0 $ cast call --rpc-url https://rpc.ankr.com/polygon 0x0eDcE5CAf830c6b845503001D8378b0d4F3b89bB 'token() (address)' 0xB0B195aEFA3650A6908f15CdaC7D92F8a5791B0B $ cast call --rpc-url https://rpc.ankr.com/polygon 0x0eDcE5CAf830c6b845503001D8378b0d4F3b89bB 'direct_deposit_queue() (address)' 0x668c5286eAD26fAC5fa944887F9D2F20f7DDF289 $ cast call --rpc-url https://rpc.ankr.com/polygon 0x0eDcE5CAf830c6b845503001D8378b0d4F3b89bB 'transfer_verifier() (address)' 0xA86C511832eAd78d30ad49711874a9F3a1dfb840 $ cast call --rpc-url https://rpc.ankr.com/polygon 0x0eDcE5CAf830c6b845503001D8378b0d4F3b89bB 'tree_verifier() (address)' 0x82907eAeB25D248dC82033E45b00A3E012Ba2d0D $ cast call --rpc-url https://rpc.ankr.com/polygon 0x0eDcE5CAf830c6b845503001D8378b0d4F3b89bB 'batch_deposit_verifier() (address)' 0x9a7B4198065efE631a962e737bDfE1f44f2CB3EE $ cast call --rpc-url https://rpc.ankr.com/polygon 0x668c5286eAD26fAC5fa944887F9D2F20f7DDF289 'pool() (address)' 0x72e6B59D4a90ab232e55D4BB7ed2dD17494D62fB $ cast call --rpc-url https://rpc.ankr.com/polygon 0x668c5286eAD26fAC5fa944887F9D2F20f7DDF289 'token() (address)' 0xB0B195aEFA3650A6908f15CdaC7D92F8a5791B0B $ cast call --rpc-url https://rpc.ankr.com/polygon 0x668c5286eAD26fAC5fa944887F9D2F20f7DDF289 'pool_id() (uint24)' 0 $ cast call --rpc-url https://rpc.ankr.com/polygon 0x668c5286eAD26fAC5fa944887F9D2F20f7DDF289 'owner() (address)' 0xd4a3D9Ca00fa1fD8833D560F9217458E61c446d8 $ cast call --rpc-url https://rpc.ankr.com/polygon 0x668c5286eAD26fAC5fa944887F9D2F20f7DDF289 'admin() (address)' 0xd4a3D9Ca00fa1fD8833D560F9217458E61c446d8 $ cast call --rpc-url https://rpc.ankr.com/polygon 0x668c5286eAD26fAC5fa944887F9D2F20f7DDF289 'implementation() (address)' 0x7883cfA8D367c433985fa320B4491489e9D3F6cD $ cast call --rpc-url https://rpc.ankr.com/polygon 0x668c5286eAD26fAC5fa944887F9D2F20f7DDF289 'directDepositTimeout() (uint256)' 86400 $ cast call --rpc-url https://rpc.ankr.com/polygon 0x668c5286eAD26fAC5fa944887F9D2F20f7DDF289 'directDepositFee() (uint256)' 100000000 ``` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://bob-docs.zkbob.com/bob-dao/governance/protocol-governance/gp-6-upgrade-zkbob-to-support-direct-deposits.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.